services/provisioning-service/src/main/java/com/epam/datalab/backendapi/core/commands/ImagesDockerCommand.java
<reponame>ep-infosec/incubator-datalab/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.epam.datalab.backendapi.core.commands;

import java.util.LinkedList;
import java.util.List;

public class ImagesDockerCommand implements CmdCommand {
    private String command = "docker images";

    private List<UnixCommand> unixCommands;

    public ImagesDockerCommand pipe(UnixCommand unixCommand) {
        if (unixCommands == null) {
            unixCommands = new LinkedList<>();
        }
        unixCommands.add(unixCommand);
        return this;
    }

    @Override
    public String toCMD() {
        StringBuilder sb = new StringBuilder(command);
        if (unixCommands != null) {
            for (UnixCommand unixCommand : unixCommands) {
                sb.append(" | ").append(unixCommand.getCommand());
            }
        }
        return sb.toString();
    }

    @Override
    public String toString() {
        return toCMD();
    }
}
